feat: set max layers to 499

Theoretically way more layers possible (I tested with 2000+) but you
can't podman run the image anymore with 500+

I think the limit used to be 255, no longer the case with Kernel 6.15+.

We want as much layers as we can get away with because it makes
rechunking much more efficient.

See: https://github.com/containers/storage/blob/83cf57466529353aced8f1803f2302698e0b5cb7/drivers/overlay/overlay.go#L56-L81

Author: renner0e

.github/workflows/reusable-build.yml

@@ -162,7 +162,7 @@ jobs:
             --privileged \
             -v /var/lib/containers:/var/lib/containers \
             "quay.io/fedora/fedora-bootc:latest" \
-            /usr/libexec/bootc-base-imagectl rechunk \
+            /usr/libexec/bootc-base-imagectl rechunk --max-layers 499 \
                 localhost/${IMAGE_NAME}:${MATRIX_STREAM_NAME} \
                 ${BASELINE_IMAGE}
 

Justfile

@@ -298,7 +298,7 @@ rechunk $image="aurora" $tag="latest" $flavor="main" ghcr="0" pipeline="0":
         --privileged \
         -v "/var/lib/containers:/var/lib/containers" \
         "quay.io/fedora/fedora-bootc:latest" \
-        /usr/libexec/bootc-base-imagectl rechunk \
+        /usr/libexec/bootc-base-imagectl rechunk --max-layers 499 \
         "localhost/${image_name}":"${tag}" \
         "localhost/${image_name}":"${tag}-chunked"